This is where zero latency monitoring and a good pair of sealed headphones comes in. You're much less likely to have wide volume swings when you're listening to yourself in real time. It's instantly obvious that you're fading out when your headphone volume dips at the same time.perhaps you were becoming enthralled in the drama, which is a good thing from a 'performance' point of view, but not so good from a recording point of view.
Highly desirable instead of trying to fix it in post production.
Unfortunately, your recording system has to be designed for that. You can't plug your headphones into the side of the computer.
Many of the newer production interfaces and mixers have Zero Latency Monitoring and a headphone connection.
What you're really supposed to be doing is watching the Audacity recording meters out the corner of your eye while you record.